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Yes. Microsoft Edge runs the V8 JavaScript engine. Microsoft’s own Edge policy documentation names V8 directly, and Edge is built on the Chromium open-source browser project. The two terms describe different layers of the browser, which is why the question often feels confusing.
Why the question causes confusion
Searches for “Edge V8” usually come from people who have seen Chromium, V8, and Chrome mentioned together and want to know which part of the browser does what. Edge is a browser. V8 is a JavaScript engine that executes the scripts web pages send to it. Chromium is the open-source project that supplies much of the browser’s code. Once those layers are separated, the answer is straightforward.
What Microsoft’s documentation says about V8
Microsoft Learn’s page for the DefaultJavaScriptJitSetting policy, last updated May 21, 2026, describes the setting this way: “Allows you to set whether Microsoft Edge runs the v8 JavaScript engine with JIT (Just In Time) compiler enabled or not.” That sentence is the direct confirmation that Edge runs V8 (Microsoft Learn, DefaultJavaScriptJitSetting policy).
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V8 and Chromium are different layers
| Term | What it is | Relationship to Edge |
|---|---|---|
| Chromium | The open-source browser project | Edge is based on it |
| V8 | The JavaScript engine | Edge runs it, as stated in Microsoft’s policy documentation |
| Microsoft Edge | Microsoft’s browser product | Built on Chromium and runs V8 |
Because the engine is a component and Chromium is the project that contains the browser’s code, saying “Edge is Chromium-based” and “Edge runs V8” are both accurate statements. Neither one replaces the other.
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Why Edge is not simply Chrome with a different logo
Sharing a Chromium foundation does not make two browsers identical. Microsoft states in its documentation on site-impacting changes that Edge adopts nearly all Chromium web-platform changes, and that Microsoft retains control over Edge and may defer or reject Chromium changes (Microsoft Learn, site compatibility-impacting changes). The word “nearly” matters: Edge is not a verbatim copy of every Chromium decision.
For extension developers, Microsoft’s extensions overview cautions that API parity is not universal and that some less-common APIs can be specific to a browser (Microsoft Learn, Overview of Microsoft Edge extensions). Shared engine and shared foundation are therefore a starting point for compatibility, not a guarantee of it.
The JIT setting is a configuration, not a different engine
JIT (just-in-time) compilation is how V8 speeds up JavaScript execution. Microsoft’s policy page states that if the policy is not configured, JavaScript JIT is enabled. Administrators can change this behavior and can apply overrides for particular URL patterns (Microsoft Learn, DefaultJavaScriptJitSetting policy).
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- Disabling JIT may slow web rendering.
- Disabling JIT may disable parts of JavaScript, including WebAssembly.
- Disabling JIT may allow a more secure configuration.
Turning JIT off changes how V8 runs code. It does not mean Edge has stopped using V8. The policy’s listed platform and version support should be checked on the documentation page before it is relied on in a managed environment.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Where Edge’s rendering engine appears outside the browser
Microsoft’s WebView2 overview states that WebView2 uses Microsoft Edge as its rendering engine to display web content inside native applications (Microsoft Learn, Introduction to Microsoft Edge WebView2). That is a rendering-engine statement only. The overview does not separately name V8, so the V8 identification in this article rests on the policy documentation.
Quick Recap
Quick answers in one place
- Does Edge use V8? Yes, according to Microsoft’s policy documentation.
- Is Edge based on Chromium? Yes. Microsoft says it adopts nearly all Chromium web-platform changes but retains control over its own browser.
- Is Edge identical to Chrome? No. Shared foundations do not mean identical behavior, and extension API parity is not universal.
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